2.Click “Start.”
3.The program will send a testing message looped in the copper segment and display a pass/fail result.
Remote Loopback
Use a remote loopback (at the remote unit, set the designated DIP switch to On; at the local unit, keep both loopback Dip switches Off/disabled) to check that the fiber segment is connected properly. Launch a loopback or diagnostics testing program (see NOTE below) and follow the program instructions. Typically, the instructions will be similar to the following:
1.Enter the number of test messages (frame packets) to be sent
2.Click “Start.”
3.The program will send a testing message looped in the fiber segment
and display a pass/fail result.
NOTE: On a PC, use a program such as Sniffer to conduct the tests. Other methods include the SmartBits series of testing equipment. If you do not have access to either method, contact your vendor for advice. IMPORTANT: Deactivate both the local and the remote loopback test functions for normal converter operation.
Link Fault Signaling (LFS)
Link Fault Signaling (LFS) is an important function that is extremely beneficial in terms of network status monitoring. The LFS function monitors both the copper and fiber segments to ensure that the Spanning Tree Protocol can kick in the moment a link failure occurs on either segment. Set LFS to On for normal operations; set to Off when installing cables or when testing the network connection.
NOTE: The LFS feature influences both fiber and copper segments. When disruption occurs on the copper segment, the fiber segment will be disabled. When the fiber segment loses signal, the copper segment will be disabled. Any link failure — including during periods of precautionary switching to the redundant link and during Link Fault Signaling — will cause the ALM LED to light up (see LEDs).
To utilize the full benefits of LFS, four converters can be used to build a primary and a secondary path between two switches. The switches must
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